Preliminary report on transfer traits of vegetative propagation from wild rice species to Oryza sativa via distant hybridization and embryo rescue
Preliminary report on transfer traits of vegetative propagation from wild rice species to Oryza sativa via distant hybridization and embryo rescue
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发表时间：
2000
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通讯作者：
Tao Dayun;P. Sripichitt
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作者：
Tao Dayun;P. Sripichitt
稻属植物的无性繁殖有多种模式。如果通过无性繁殖将水稻从一年生型转变为多年生型，那么该多年生品种将是环境友好且经济可行的。通过宿根种植或留茬种植增加水稻收成面积的潜力巨大，一些人希望通过无性繁殖固定杂种优势来打破产量平台。另一个优点是可以缩短从杂交到形成固定系的时间间隔。宿根或留茬作物性状的可能来源是普通野生稻 (O. rufipogon)。其他具有根茎形成能力用于多年生水稻育种的物种有长雄稻、药用稻、根茎稻和澳大利亚稻。在这项研究中，多年生性状通过远缘杂交从野生种 O. longistaminata、O. rhizomatis 和 O. officinalis 转移到栽培稻 (O. sativa) 上。水稻和野生物种的基因型、雄性物种的花粉育性和环境因素可能有助于所得胚胎的杂交性或发芽率。最后，“假”杂交问题和稻属内所有物种的繁殖，这些物种可以是多年生的（O. rufipogon、O. glumaepatula、O. eichingeri、O. latifolia、O. alta、O. grandiglumis、O. longiglumis、O. meyeriana、O. capsulata）或一年生的（O. sativa、O. nivara、O. meridionalis、O. glaberrima、 O. barthii、O. punctata）。在一定环境下，多年生物种O. glumaepatula具有分蘖能力作为无性繁殖的手段(Oka和Morishima，1967)，这可以作为稻属所有物种无性繁殖的模式。
There are diversified patterns of vegetative propagation in Oryza spp. If Oryza sativa is changed from annual type to perennial type via vegetative propagation, the perennial cultivar would be environmental sound and economical viable. There would be a great potential to increase rice harvest area via ratoon cropping or stubble cropping and some hope to break yield plateau via fixing heterosis by vegetative propagation. Another advantage is that it would shorten the time interval from hybridization to form fixed lines. A possible donor of the trait for ratoon or stubble cropping is O. rufipogon. The other species possessing rhizome formation ability for breeding of perennial rice are O. longistaminata, O. officinalis, O. rhizomatis and O. australiensis. In this study perennial trait was transferred from wild species O. longistaminata, O. rhizomatis and O. officinalis to cultivated rice (O. sativa) through distant hybridization. Genotypes of O. sativa and wild species, pollen fertility of male species and environmental factors could contribute to crossability or germination rate of the resulting embryos. Finally “false” hybrid problem and propagation of all species within genus Oryza, which could be perennial (O. rufipogon, O. glumaepatula, O. eichingeri, O. latifolia, O. alta, O. grandiglumis, O. longiglumis, O. meyeriana, O. granulata) or annual (O. sativa, O. nivara, O. meridionalis, O. glaberrima, O. barthii, O. punctata). Under certain environment, perennial species O. glumaepatula has tillering ability as a mean of vegetative propagation (Oka and Morishima, 1967), which could be used as a pattern of vegetative propagation for all species of the genus Oryza.